What is the action level for copper in drinking water?

The action level for copper in drinking water is set at 1.3 mg/L. This standard is established by the Environmental Protection Agency (EPA) to protect public health, particularly for vulnerable populations such as infants and pregnant women. When copper levels in drinking water exceed this threshold, utilities are required to take action. This can include measures like corrosion control treatment or public education on the effects of copper.

Copper is a metal that can enter drinking water primarily through the corrosion of plumbing systems, notably those made of copper piping. High levels of copper can lead to health issues such as gastrointestinal distress and, at very high levels, liver and kidney damage. Therefore, the action level is aimed at minimizing exposure and ensuring the water remains safe for consumers.

Understanding these levels and their implications is crucial for monitoring and maintaining water quality in municipal systems, making the recognition of the 1.3 mg/L action level particularly important for those in the field of water quality management.